Implement (begin|end)_ptr in C++11 and add deprecation comment #8850
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This returns a pointer to the beginning of the vector's data.
dcousens
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Oct 1, 2016
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utACK e9059ac |
btcdrak
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Oct 1, 2016
Implement `begin_ptr` and `end_ptr` in terms of C++11 code, and add a comment that they are deprecated. Follow-up to developer notes update in 654a211.
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Removed a stray 'noexcept' from the prevector.h patch, it came in from |
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utACK f00705a |
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a8b965e Explicitly initialize prevector _union (random-zebra) bdd98e8 [Trivial] Add a comment on the use of prevector in script. (random-zebra) bbaa6e3 Clarify prevector::erase and avoid swap-to-clear (random-zebra) 28a8435 prevector: assert successful allocation (random-zebra) de41cb5 Only call clear on prevector if it isn't trivially destructible (random-zebra) 8784df3 Make CScript (and prevector) c++11 movable. (random-zebra) 83f9ac6 serialize: Deprecate `begin_ptr` / `end_ptr` (random-zebra) c3ecc12 prevector: add C++11-like data() method (random-zebra) 5490aa0 test prevector::swap (random-zebra) 035760e prevector::swap: fix (unreached) data corruption (random-zebra) 0e71400 prevector: destroy elements only via erase() (random-zebra) 9811a68 [Core] Prevector type (random-zebra) Pull request description: Based on: - [x] #1554 This introduces `prevector<N, T>`, a new basic data type which is a fully API compatible drop-in replacement for `std::vector<T>` and uses it for the script, to reduce the considerable memory overhead of vectors in cases where they normally contain a small number of small elements. Original tests in Bitcoin showed a reduction in dbcache memory usage by **23%**, and made an initial sync **13%** faster. Backported from the following upstream's PRs, with only additional edits in the 2nd layer scripts (`masternode-payments`, `masternode-budget`) and in the unit tests (to address the differences in `insecure_rand`): - bitcoin#6914 - bitcoin#7888 - bitcoin#8850 - bitcoin#9349 - bitcoin#9505 - bitcoin#9856 - bitcoin#10534 - bitcoin#11011 - bitcoin#14028 ~~NOTE: Updates to `memusage.h` needed as well, when #1531 is merged.~~ ACKs for top commit: furszy: Tested ACK a8b965e . Fuzzbawls: ACK a8b965e Tree-SHA512: 203b660dd8d9f98780be660dae0ac951766ba438836bd6f0ec921e7749c1a84143f3b920fe49f2cc399f4aa7e763098f78746d3b6ff845bcf913bb13de984bc1
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Implement
begin_ptrandend_ptrinserialize.hin terms of C++11 code, and add a comment that they are deprecated.Follow-up to developer notes update in 654a211.
Also add a
data()method toprevector, this is necessary to support this.